i've got the same problem since the last launcher update. first i thougt it was related b my bad internet connections atm. but no, its not. i cant log in to most of the mods. tekkit lite yogbox are the only ones i can play. even some more mods (myminecolony+ and minecolony and simukraft are able to load everything) the rest is not workling at all. pressing log in, it went black with white letters showing 1.25 seconds a 0% loading and cuts off looking like nothing was done. using the same labtop since 1year now in difrent lokations (germany, spain, italy, frence) never told me mojang that i was blocked and my acc IS active (was cheking after reading the tread )
maybe it is still some issus with the launcher. they fixed it for tekkit lite (like the description and news in the technik page) but after that nothing happend. i am still waiting to get some news from the technik launcher beeing fixed. he was taking something from the net some days ago, but i could not see any changes.
i also tryed everything that was describted in this treat without anyone of them helping me
@darxio: you are not allone